As far as I know, the tank repair and production plants in Kyiv and Kharkiv (Malyshev, the biggest one) have been hit by Russian strikes. However, there is also one in Lviv that to my knowledge has not been hit and is probably still functioning. Most Ukrainian tank and AFV production was in Kharkiv (Malyshev, KhTZ, etc.), so if the city is reasonably safe now production can probably resume.
One of the bigger issues is a lot of the pre-war armour plate production was in Mariupol, so I don't know if they have plate supply from other places like Kryvyi Rih.